Display device



Dec. 12, 1944. F PARR mL 2,364,999

DISPLAY DEVICE Filed Dec. 27, 1941 ATTORNEY Patented Dee. 12, 1944 DISPLAY DEVICE Frank Parr and Elmer Parr, Mountain Lake, Minn.

Application December 27, 1941, `Serial No. 424,591 2 claims- (C1. sil-36) This invention relates tedispny devices and more particularly to devices of this kind, wherein a series of cards are changed, one after the other, to give a succession of data, such for exam|ple as a succession of advertising matter or a series of datesas' in a calender.

The device herein disclosed is shown specifically as a calender, which is controlled by an electric clock, to change the cards once every twenty-four hours, but it is understood, of course, that this device maybe used for any display matter, whatsoever, Ythat is to be changed from time to time.

An electrically operated clock is shown only in diagramas the construction of this disclosure will be made-the subject matter of a separate application for patent.

One object of this invention is to provide a calender device having a magazine to receive a stack of cards, one for each day of the year, and a solenoid device to change them individually each twenty-four hours.

Another object is to provide, in a device of this kind means for ejecting, from the device, each card as it is being replaced.

Another feature is the method of advancing the cards in the magazine of the device.

Another feature is the solenoid actuated mechanism to remove the cards from the magazine ad seriatim.

Another object of this invention is to provide a device to feeda series of cards, having advertising matter printed thereon and which cards may be changed from time to time either manually by closing an electric contact or automatically by any well known electrical timing device, such for example, as an electrically driven synchronous clock which closes a circuit to the device at predetermined iperiodic intervals.

Additional objects and features of this invention will be brought out in the following description all of which come within the scope of the same.

Referring to the drawing:

Fig. 1 is a front View of the calender device showing how an electric clock, to operate it, may be mounted on a common base with the calender.

Fig. 2 is a sectional view of the device showing a solenoid mechanism for operating the same.

Fig. 3 is a diagram of electrical connections.

The same numerals are used throughout the different views for the same parts.

The calender consists of a casing I within which is assembled the mechanism to accomplish the above resultsl. In the upper part of the casing I is mounted a rectangular receptacle 2 to' receive a stack of printed cards 3 which are arranged in order to be displayed one after the other in succession. Each card may be printed for use as a calender with the day of the week, the month and the day of the month as shown in Fig. 1. The card receptacle 2 has a rectangularvcross section and isassembled in the casing I on an incline so that a stack of cards 3 inserted therein will tend to slide down towards the front of the casing I, by theforce of gravity with the assistance of a roller 4, insertedin the receptacle 2 and which bears against the back of the' stack of cards 3. The cards are pressed against a display window pane 5 recessed in the front of the casing I. The casing I has an opening 6, registering with the pane 5, so that the iirst card of the stack may be viewed therethrough. As the cards 3 are advanced in the receptacle 2 they enter successively one by one into a rectangular opening in a slide 'I. Secured to the lower end of the slide I is one end of a cord or cable 8 which ,passes under a grooved pulley 9 pivoted to a bracket I0 secured to the casing I. The opposite end of the cable 8 is then secured to the lower end of a lever II pivoted at I2 to a horizontal cross bracket I8 secured at each end to the casin'g I. The ulpper end I3* of the lever II is pivoted at I4 to the outer end of a movable iron solenoid core I5, slotted at I6 to receive the same. A stop I'I, secured to the casing I, limits the outward movement of the core I5. The upper end of the slide 1 has one end. of a cable I9 secured to it, which passes, over a grooved pulley 20 and is secured at its opposite end to one end of a spiral spring 2|, having its other end hooked into the end of a screw 22 in the casing I.

In order to control the movements of the core I 5 electrically, its end is slidably mounted in one end of a tube 25 having a ange 23 at each end thereof, and insulated wire 24 wound on the tube 25. The opposite end of the tube 25 is provided with a short stationary iron core 30 secured by screw 29 to a bracket 26, secured by screws 28, to a iiange 21 of the cross bar I8. .It is readily seen that as current is passed through the solenoid windings the core I5 is drawn into the tube 25 thereby moving the slide 1 downwardly against the tension of the spring 2l. As this movement takes place the rst card 3 in the stack is moved downwardly from the opening 6 to a lower opening 3l in the casing I through which it is ejected by a spring 32, secured at its lower end to the flange 21 of the cross bar I8, and free a1; its

upper end to press against the rear of the first card, as it is moved downwardly, to eject it. When the solenoid is de-energized,v the spring 2l will return the slide 'l to its normal upper position shown in Fig. 2, and permit the next card 3 to enter the opening therein, and so forth until all the cards have been advanced and ejected, at which time a new stack of cards may be inserted in the receptacle. Back of the slide l is a guide plate 33 secured to the forward end of the receptacle 2 by screws 34. The slide 1 moves between the guide plate 33 and the inside of the front of the casing I.

The diagram in Fig. 3 shows the line wires 35 connected to a clock motor 3B, also to the sole-I noid windings 24, which may be connected in the circuit 35 manually by a push button -or switch 31 and also automatically by the contacts 38, actuated by the clock motor 36, to close the circuit 35. A main line switch 39 to the solenoid windings 24 is provided to cut out the operation of the device if desired but without disturbing the operation of the clock itself.

The clock 40 shown in Fig. 1 may be of any type that will make an electric contact at predetermined periodic intervals.

Having described our invention so that anyone skilled in the art to which it pertains can make and use the same, what We claim as our invention and wish to secure by Letters Patent is:

1. A card display device including a casing, having an observation opening in the front member thereof, to display the first of a stack of movable cards therein, an inclined receptacle for the cards, mounted 'in said casing, and terminating at one end of said opening, a. weight in the receptacle eifective to advance the cards as a group towards the opening, a slide member, mounted to slide on the surface of the front member, and having an aperture therein, to receive the first card of the stack and holding the same in front of said observation opening, a solenoid device to actuate the slide member, whereby lthe rst card is removed from observation, including a cable secured to the slide member at its lower end and a lever connecting the cable to said solenoid device.

2. A card display device including a casing,

- having'an observation opening and a card outlet inthe front member thereof, to display the first of a stack of movable cards therein, an inclined receptacle for the cards, mounted in said casing, and terminating at one end of said opening, a weight in the receptacle to bear against and advance the cards as a' group towards the opening, a. slide member, mounted to slide on the inside surface of the front member, and having an aperture therein to receive the first card of the stack and holding the same in front of said observation opening, means to move the slide member from its initial position to a lower position, whereby the iirst card is removed from 'observation, means to return the slide member to its initial position, and means to eject a. card through said outlet when the slide member is in its lower position.

FRANK PARR.

ELMER PARR.. 

